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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning M235i BM3 Stage 1 w/Catless DP Datalog Question

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      07-22-2019, 06:36 PM   #1
Nandohatesyou
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Exclamation M235i BM3 Stage 1 w/Catless DP Datalog Question

Hey everyone, new to the forum. Upgraded from an 06 STI to a 2016 M235i.

I had the car for a few months and bought some parts off a fellow forum member and pulled the trigger on a BM3. So far my mods are VRSF Chargepipe, VRSF Catless DP, and an AA Intercooler. I didn't want to push the car too hard so I just flashed the Stage 1 91 map. Power feels good.. but is there any drawbacks from running Stage 1 as opposed to Stage 2? Any input is greatly appreciated I live in CA and the best gas available in town is 91 from Shell.

At the bottom of the table (Googles Docs URL), I saw it had picked up some knock. Literally for just one cell each, but don't know how serious of a problem it is. I know knock on my old STI was pretty common, but how prevalent should one be picking up knock?



EDIT: Also added the BM3 datalog sheet.

http://www.bootmod3.net/log?id=5d3640eec090c63991f047ae

https://docs.google.com/spreadsheets...it?usp=sharing

Last edited by Nandohatesyou; 07-23-2019 at 08:14 AM..
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      07-23-2019, 05:16 PM   #2
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I always recommend to send it to the experts at PTF
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      07-23-2019, 05:58 PM   #3
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Quote:
Originally Posted by mike@x-ph.com View Post
I always recommend to send it to the experts at PTF
Thanks Mike, I flashed from Stage 1 over to Stage 2 (because of the catless downpipe + intercooler) and I took some more logs and sent them over to them, just waiting for now. If anyone else is interested in taking a look and providing some feedback, here they are.

http://www.bootmod3.net/log?id=5d37792dc090c63991f04a6a

http://www.bootmod3.net/log?id=5d37792bc090c63991f04a69
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      07-23-2019, 06:38 PM   #4
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Quote:
Originally Posted by Nandohatesyou View Post
Quote:
Originally Posted by mike@x-ph.com View Post
I always recommend to send it to the experts at PTF
Thanks Mike, I flashed from Stage 1 over to Stage 2 (because of the catless downpipe + intercooler) and I took some more logs and sent them over to them, just waiting for now. If anyone else is interested in taking a look and providing some feedback, here they are.

http://www.bootmod3.net/log?id=5d37792dc090c63991f04a6a

http://www.bootmod3.net/log?id=5d37792bc090c63991f04a69
First log - IAT jump during WOT 73-92 mph about 20 degrees. Timing is good, Boost, AFR....
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      07-24-2019, 08:20 AM   #5
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Quote:
Originally Posted by BostonM235xi View Post
First log - IAT jump during WOT 73-92 mph about 20 degrees. Timing is good, Boost, AFR....
Thank you for your feedback. Is this jump in temperature normal? I'm currently running an Active Autowerke intercooler, but I see this jump frequently. I did some more pulls this morning and saw a jump from 77 degrees to 100.

Edit: Also, how bad is picking up 1 knock detected value (Short 0-60 log from today) in the lower rpm ranges? I exported it to Excel format and see it just takes up one cell, so I'm assuming this is a fraction of a second?

Last edited by Nandohatesyou; 07-24-2019 at 10:57 AM..
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      07-24-2019, 06:13 PM   #6
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Quote:
Originally Posted by Nandohatesyou View Post
Quote:
Originally Posted by BostonM235xi View Post
First log - IAT jump during WOT 73-92 mph about 20 degrees. Timing is good, Boost, AFR....
Thank you for your feedback. Is this jump in temperature normal? I'm currently running an Active Autowerke intercooler, but I see this jump frequently. I did some more pulls this morning and saw a jump from 77 degrees to 100.

Edit: Also, how bad is picking up 1 knock detected value (Short 0-60 log from today) in the lower rpm ranges? I exported it to Excel format and see it just takes up one cell, so I'm assuming this is a fraction of a second?
A knock doing a 0-60 isn't uncommon. During a 40 or 60+ you shouldn't get one...
FMIC during WOT shouldn't rise 20-30 degrees.. 0-10 maybe.. I have VRSF HD and during WOT maybe 5 degree rise.
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      07-24-2019, 07:15 PM   #7
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Quote:
Originally Posted by BostonM235xi View Post
A knock doing a 0-60 isn't uncommon. During a 40 or 60+ you shouldn't get one...
FMIC during WOT shouldn't rise 20-30 degrees.. 0-10 maybe.. I have VRSF HD and during WOT maybe 5 degree rise.
So far haven't seen knock in 40+ so fingers crossed, and shit is this AA intercooler that bad? I'll talk to Mike about getting a VRSF HD intercooler, I need to run cooler in this 100+ degree weather in Cali right now.
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      08-16-2019, 04:00 PM   #8
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Quote:
Originally Posted by Nandohatesyou View Post
So far haven't seen knock in 40+ so fingers crossed, and shit is this AA intercooler that bad? I'll talk to Mike about getting a VRSF HD intercooler, filezilla uc browser rufus I need to run cooler in this 100+ degree weather in Cali right now.
Thank you for your feedback. Is this jump in temperature normal? I'm currently running an Active Autowerke intercooler, but I see this jump frequently. I did some more pulls this morning and saw a jump from 77 degrees to 100.

Last edited by MAILIYAT; 08-22-2019 at 11:28 AM..
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      08-27-2019, 01:05 PM   #9
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What does a "knock" mean
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      08-27-2019, 01:09 PM   #10
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Also curious if there is any drawbacks from going stage 1 compared to stage 2 . I did the same in my 2014 m235. Vrsf DP, CP & ATM intercooler
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